Electric heater.



W. S. HADAWAY, 1a.

ELECTRIC HEATER. APPLICATION FQILED SEPT.2'6. ms.

1 1 54, 1 1 1 Patented Sept. 21, 1915.

I 2 SHEETS-SHEET I. 5 L91 WITNESSES IN l/EIV TOR 9%? KMMWWM 3- By \7 I M I 3 W Y ATTORNEY COLUMBIA PLANOGRAPH 60., WASHINGTON. n. c.

W. S. HADAWAY, In.

ELECTRIC HEATER.

APPLICATION FILED SEPT.26, 1913.

1,1 54,1 1 1. Patented 21, 1915.

2 SH TS-SHEET 2.

WITNESSES IN l/E/VTOI? Z1. W. msfim y, Jim

By W ATTORNEX To all euhom it may concern 7 Jr., a citizen of the UnitedStates, and a resi-' UNITED. sTA'r s P TENT orrion.

WILLIAM. S. HAIDAWAY, 11,1035 NEW ROGHELLE NEW YORK.

ELECTRIC I IEAT R.

Be it known thafiL'wILI iIAM S. HADnWAY,

dent of New Rochelle, in the county of Westchester and State of New York, have invent ed certain new and useful Improvements-in 1 Electric Heaters, of-which' the following is V a specificatiom'reference beinghad to the accompanying thereoff My'invention relates' to electric heating devices, and particularly to such as are drawings, forming; a 7 part adaptedto heat the ironing rolls of laundry machinery. One object of readily applicable tolaundry rolls'and like devices of standard construction without in-* volving either changes or addltions inthe construction of the roll.

Another object. is to'provide' an electric heater for a rotating object that shall effectively and efliciently impart heat thereto, but

that shall bestationary and'mechanically in dependent thereof,- thereby avoiding all ne cessity for moving contacts and facll tatlng' the control and adjustment of the heater.

' fication and then point out the novel features front eleVation On a relatively small scale thereof in appended claims.

Referring to the drawings :Figure 1 is a of a laundry machine equipped with the heater of my invention. A longitudinal section of'a laundry roll anda heater arranged and constructed in accordance with 1my invention is" shown in Fig. Fig. 3 is an viewof one of thefasteners-with its cooper ating parts separated is shown in Fig. '5.

end elevation with the cap removed, of the heater shown inFig. 2. A detail "view of the heater element is shown in Fig. 4:, to-l gether with a plan viewv of one of its supporting clamps or fasteners A perspective Figs. 6 and 7 are diagrammaticviewsillustrating the circuit connections whiclimay be established between the heater units which form a part of the heater of my invention. 1

Corresponding'p'arts are designated by the" same reference characters all the figures.

. 1Q represents a' hollow cylindrical laundry my invention is to provide a heater that shall not only besimple and inexpensive to construct but that shall be I j Specification of Iietters Patent. Patented Sept, 21, 1915 Application filed September as, 1913; 'Seria1No.791,9 35'.,

roll or similar device which constitutes a part of a laundry machine 12 in which it'is irotatably supported. lhe roll extends-out operation is necessary. 7

Electric energy has hitherto been eXtensively used for heating laundry rolls but the heaters which havebeen employed have constituted an attachment to, or a part of, the roll structure and have been rotatable with it. Heaters of this kind are arranged and intended to transfer the generated heat to the-roll by conduction.- Furthermore, they require'slip rings or othermoving contacts and therefore necessitate material changes and additions to be vmade to the roll before they are operative. As usually constructed, they have a relatively great inertia so that a comparatively long time is'required to bring the roll up to the proper temperature; -A ccording to my present invention I provide a heater whichoperates on an entirely different principle and which efficiently and rapidly imparts heat'to the roll without either rotating with the roll or being in'engagement with it at any point. The heater comprises a perforated sheet metal cylinder 20, a plurality of strips of'sheet metal resistance ribbon 30 mounted thereon, a support- .ingring 40 anda suspension bracket 50.

from a pipe flange 52 which is secured to the .fioor or other suitable base 53, and an over hanging section 54 connected to the upa right 51 by'suitable pipe joints 55.

l he hollow cylinder 20 which forms a part of the heater is fitted onto a cylindricalprojection 41 of the supporting ring 40, and is secured in position by screws orbolts 42. The supporting ring comprises two parts which are secured together by screws arranged in three groups of two screws43 and 43* each. One of the parts 44 has a tapped sleeve projection 45 which is adapted to en gage the screw-threaded'l'ower endof the :pipe section 54: of the bracket. The other member has the cylindrical projection which is considerably-J smaller in diameter than the section 4:4, and an annular body 46 in which are provided a series of apertures 4:7. The screw 43 of each group extends through a lug as of the member i l and into a tapped hole in a lug -it9 of the other ring member. The screw 43 however extends through a tapped hole in the lug 49 and presses against the lug 49 so as to tend toseparate the members of the ring at the point of contact. It is obvious that by manipulating'the screws t3l3 of the several groups, the cylinder may be readily centered in the roll. A terminal member 60 extends loosely through each of the apertures at? and is secured to the annular body 46, being at the same time insulated from it by means of insulating bushings and washers in the usual manner.

with a plurality of apertures or perforaw trons 21 arranged in longitudinal rows and adapted to receive hollow rivets 22 by means of which a clip is held in position on its outer surface. Each of the clips 70, as clearly shown in Figs. at and 5, consists of two L-shaped members 7l72 which are preferably stamped or punched from sheet metal. The member 72' has an offset lug 73 at one corner and an offset lug 74. spaced from the lug '73 and centrally located. The member 71 has a hole 75 to receive the ofii'set lug H and has an offset lug 76 atthe opposite corner from the lug 73. The length of each branch of the Lshaped member 72 is slightly less than the corresponding dimension of the member 71, the members being adapted to be nested together as shown in Figs. 2 and l. Their bases are correspondingly perforated at 77 to permit one of the' hollow rivets 22 to extend through them.

The resistance element 30 preferably comprises a zigzag ribbon of relatively high resistance conducting material, a plurality of longitudinal strips of ribbon being employed as indicated by the diagrams of Figs. 6 and 7. One end of each strip of zigzag ribbon is clamped to one of the terminal members 60 as shown in Fig. 2, by means 1 of one of the screws 61 and it is supported at intervals by means of the clips 70, the ribbon being clamped between the members 71 and 72 of each clip and being prevented from slipping by the lugs 7 37et7 6.

At the outer end of the hollow cylinder 20 is secured a guard ring 23 which has a flange 24 of sufficient size to prevent the re sistance element 30 from coming into en: gagement with the inside walls of the roll at any point. The guard ring 23 is particularly important since it prevents the A screw (51 is secured in, a tapped hole in the head of each of the terheater from becoming injured when it is being inserted in the roll 10. The roll is usually long relative to its diameter and the resistance ribbon and clips near its outer end would otherwise be liable to injury.

Attention is particularly directed to the fact that the heater 7907' se is extremely simple and light in. construction while at the same time it is mechanically independent and detached from the roll. I t is furthermore stationary and consequently the connecting leads from the outer. ends of the terminal members may be led through the pipe to any suitable point where simple knife blade or snap switches (not shown) can be conveniently located for governing the circuit arrangement of the heater elements in order that the temperature of the roll may be regulated. .The sheet metal disk 80 is arranged to close the end of the ring ll, which constitutes a terminal box, and is held in place by screws 81. The disk 80 may be readily removed and the outer member -ll may be detached from the body of the ring 40. 4

The sections of the heater element may be connected in any suitable manner depending upon the heat required and the voltage of the circuit from which energy is supplied. The arrangement of Fig. (3 is suit able for approximately double the voltage for which the arrangement of Fig. 7 is intended. Considering the heater as a whole, two-end terminals and one intermediate terminal are provided in each casein order that the usual heat changes may be ellected by utilizing one-half of the heater, the two sections in series or the two sections in multiple. It is unnecessary to distribute the sections of the heater element with uniformity or in any particular manner in a circumferential. direction, so long as each section extends over the entire length, because of the fact that the roll to which the heat is imparted is not stationary but rotates.

, As above indicated, it'is usual to depend largely upon conduction for transferring the heat from the heater 'elements to the body. The heater of my invention however, is arranged and designed to operate at ahigh temperature and to transfer a large proportion of the heat generated in it.

ary support, a heat generator secured to and extending from said support, and means for adjusting the connection between the supportand theheat generator, whereby the inclination of the generator axis may be varied as desired.

2. An electric heater comprising a station- I ary support, a hollow cylindrical heat generator, and means for adjustably securing the heat generator to the support only at one end, whereby the inclination ofthe genconnecting through the supporting ring, ahollow cylindrical heat generator secured to the ring erator axis maybe varied as desired.

3. electric heater comprising a stationary support, a ring having an annular flange, a cylindrical heat generator secured at one end to said annular flange and .ex-

tending outwardly therefrom, and means for adjustably securing the ring to the stationary support whereby the ring may be tilted and inclination of the generator axis varied as desired.

et. An electric heater comprising a station ary support, a ring having a perforated annular flange, a perforated sheet metal cylinder mounted on the ring and extending.

coaxially therewith in one direction therefrom, a resistance element supported by said metal cylinder, and an adjustable connection between the ringand the support'whereby the metal cylinder may be adjusted as to the inclination of its axis.

5. An electric heater comprising a station ary ring, a ring or collar adjustably connected thereto and having a perforated annular flange, a plurality of terminal members extending axially of the ring through the perforations in said flange, a perforated sheet metal cylinder mounted on the flange and extending coaxially therewith in one direction, and a resistance element supported and insulated from the outer surface of the metal cylinder, said adjustable connection between the. rings being arranged to permit the'adjustment of the cylinder with respect to the inclination of its axis.

6. An electric heater comprising astationary supporting ring, a second ring having an annular flange, a plurality of axial screws for securing the rings together, and axial adjusting screws adjacent tothe respective screws 7 and extending only fi ange,,the said connection between the rings being arranged to permit the adjustment witnesses.

forated sheet metal support, hollow rivets extending through the perforations, a plurality of two-partclips secured to the support at the perforations by the hollow rivets and insulated therefrom, and a resistance element secured to the clips above the surface of the support. 7

8. An electric heater comprising a resistance element, a support,'a plurality of twopart L-shaped sheet metal clips adapted to clamp the resistance element between them, the parts of each clip being secured together and. to the support by a single rivet.

9. An electric heater comprising a perforated sheet metal support, a plurality of two-part L-shaped sheet metal clips, a zig- Zag resistance ribbon mounted edgewise relative to the' surface of the support and clamped between the two parts of each clip, a hollow rivet by which said parts are secured together and to the sheet metal memher at a perforation therein.

10. An electric heater comprising a stationary ring having a perforated annular flange, a plurality of terminal members extending axially of the ring through the perforations in said flange, a perforated sheet metal cylinder mounted on the ring and extending coaxially therewith in one direction, 'a plurality of two-part sheet metal clips secured to and insulated from the cylinder and extending outwardly from the surface thereof, and a resistance element secured to a terminal. member at one end and supported at intervals by said clips out of engagemen with the surface of the cylinder.

11. Incombination, a laundry roll rotatably supported near one end, a stationary electric heater supported near the opposite end of the roll and extending into the roll,

and means for adjusting and determining the inclination of the heater relative to the axis of the roll.

In testimony whereof, I have hereunto set my hand this 24th day of September, 1913, in the presence of two subscribing WILLIAM s. HADAWAY, JR.

Witnesses: G. R. QUIMBY,

F. B. GRAVES.

Copies of this patent may be obtainedfor five cents each, by addressing the Commissioner of Patents.

Washington. D. 0." 

